Of a sinusoidal wave, an integral multiple of the frequency, i.e., the fundamental, of the wave, other than the fundamental itself.
Note 1: The first overtone is twice the frequency of the fundamental, and thus corresponds to the second harmonic; the second overtone is three times the frequency of the fundamental, and thus corresponds to the third harmonic, etc.
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[The] Process of writing patterns of data on top of the data stored on a magnetic medium. [INFOSEC-99]

Open Virtual Machine Format

In video teleconferencing, pertaining to a family of CCITT (now, ITU-T) Recommendations, where p is a non-zero positive integer indicating the number of 64 kb/s channels.
Note: The p × 64 family includes Recommendations H.261, H.221, H.242, H.230, and H.32
0. These Recommendations form the basis for video telecommunications interoperability.

Proxy-Call Session Control Function

Abbreviation for peak-to-average ratio.

Point-to-Multipoint

1. point-to-point,
2. peer-to-peer.

Abbreviation for private automatic branch exchange. See PBX.
Note: Use of the term "PBX" is more common than "PABX," regardless of automation.

1. In data communication, a sequence of binary digits, including data and control signals, that is transmitted and switched as a composite whole.
Note: The data, control signals, and possibly error control information, are arranged in a specific format.
2. The fundamental unit of communication on the Internet.